Pokémon GO's upcoming Equinox event will introduce a new item to the game.
From Friday 22nd September until Monday 2nd October, players have the chance of grabbing a 2km egg with rare Pokémon such as Chansey, Mareep and Larvitar inside. Double Stardust will also be awarded for catching 'mon and hatching eggs, and any new Pokémon registered to the Pokédex during the event will earn triple the usual XP.
However, perhaps the biggest news about the Equinox event is the introduction of Super Incubators, which will hatch eggs one-and-a-half times faster than usual. From the sound of things, these will need to be purchased using coins from the game's shop.